HYDRA-MATIC 4L60-E (RPO M30) Service Replacement Transmission Assemblies (SRTA) and limited on-car repairs will be available at the start of the 1993 model year. If repairs are required to a 4L60-E automatic transmission, please contact the Technical Assistance Network on 1-800-227-3175 for the Transmission/Service Manual Bulletin Group before proceeding with repairs. A bulletin with full details of this program will be mailed to your dealership in the near future.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.